Gastec 13TP Carbon Disulphide Detector Tube Instructions

Quick guide from the manual

The Gastec 13TP Detector Tube is designed for measuring Carbon Disulphide in air or industrial atmospheric conditions. This guide outlines the necessary steps for operation using a compatible Gastec Air Sampling Pump (Model GSP-300FT-2 or GSP-501FT). Always ensure the tube is used within the specified temperature (0-35°C) and humidity (0-90% RH) ranges for accurate results.

Measurement Procedure

1. Confirm the black colour inlet rubber tube holder is equipped with the pump.
2. Break the tips off both ends of a fresh primary and secondary tube using the pump's tube tip breaker.
3. Connect the ends marked with the circle symbol using rubber tubing.
4. Insert the tube into the pump inlet, ensuring the arrow on the tube points toward the pump.
5. Set the flow rate to 100 mL/min and the timer to 10 minutes on the pump.
6. Press the start switch to begin sampling.
7. Once sampling is complete, remove the tube and read the concentration level where the stained reagent meets the unstained reagent.
8. If the reading is higher than 1.0 ppm, repeat the process using a fresh tube with a flow rate of 50 mL/min and a timer set to 10 minutes.
9. Apply correction factors for sampling rate and atmospheric pressure if necessary.

Interferences

The following substances may interfere with the reading. If these gases are present, the test result may be affected:

• Hydrogen sulphide: ≧ 0.1 ppm (Interference: +)
• Carbonyl sulphide: ≧ 0.8 ppm (Interference: +)
• Dimethyl disulphide: ≧ 1.0 ppm (Interference: +)
• Sulphur dioxide: ≧ 0.1 ppm (Interference: +)

Methylene Chloride, Acetone, and Methanol do not cause discolouration and do not interfere within their specified ranges.

Environmental Conditions and Corrections

No temperature or humidity correction is required within the range of 0-35°C and 0-90% R.H. For pressure corrections, use the following formula: Tube Reading (ppm) × 1013 (hPa) / Atmospheric Pressure (hPa).

Safety and Disposal

Caution: When breaking tube ends, keep away from eyes. Do not touch broken glass or reagents with bare hands. The pretreatment tube contains a small amount of hexavalent chromium. Dispose of all tubes according to local government rules and regulations.